Is CVE-2022-23527 in the CISA KEV catalog?

No. CVE-2022-23527 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-23527?

CVE-2022-23527 has a CVSS v3 base score of 4.7 (MEDIUM).

What is the EPSS score for CVE-2022-23527?

CVE-2022-23527 has an EPSS score of 0.91% (55th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-23527?

Upgrade libapache2-mod-auth-openidc on debian 11 to 2.4.9.4-0+deb11u2 or later. Fixes are available for 15 affected products.

CVE & CISA-KEV Catalog

CVE-2022-23527

MEDIUM

4.7

CVSS v3

NVD

Description

mod_auth_openidc is an OpenID Certified™ authentication and authorization module for the Apache 2.x HTTP server. Versions prior to 2.4.12.2 are vulnerable to Open Redirect. When providing a logout parameter to the redirect URI, the existing code in oidc_validate_redirect_url() does not properly check for URLs that start with /\t, leading to an open redirect. This issue has been patched in version 2.4.12.2. Users unable to upgrade can mitigate the issue by configuring mod_auth_openidc to only allow redirection when the destination matches a given regular expression with OIDCRedirectURLsAllowed.

CWE-601Open Redirect

How to fix

Remediation Available

libapache2-mod-auth-openidcDebian

Fixed in:2.4.9.4-0+deb11u2CVE-2022-23527

Fixed in:2.4.12.2-1CVE-2022-23527

cjoseRocky

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.aarch64::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.ppc64le::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.s390x::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.src::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.x86_64::mod_auth_openidc:2.3RHSA-2023:6940

cjoseRed Hat / RHEL

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.s390x::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.src::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.aarch64::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.ppc64le::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.x86_64::mod_auth_openidc:2.3RHSA-2023:6940

cjose-debuginfoRocky

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.aarch64::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.x86_64::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.s390x::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.ppc64le::mod_auth_openidc:2.3RHSA-2023:6940

cjose-debuginfoRed Hat / RHEL

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.x86_64::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.s390x::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.ppc64le::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.aarch64::mod_auth_openidc:2.3RHSA-2023:6940

cjose-debugsourceRocky

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.ppc64le::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.aarch64::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.x86_64::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.s390x::mod_auth_openidc:2.3RHSA-2023:6940

cjose-debugsourceRed Hat / RHEL

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.ppc64le::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.aarch64::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.s390x::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.x86_64::mod_auth_openidc:2.3RHSA-2023:6940

cjose-develRocky

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.s390x::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.aarch64::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.x86_64::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.ppc64le::mod_auth_openidc:2.3RHSA-2023:6940

cjose-develRed Hat / RHEL

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.ppc64le::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.s390x::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.aarch64::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:0.6.1-4.module+el8.9.0+19469+5b493da9.x86_64::mod_auth_openidc:2.3RHSA-2023:6940

mod_auth_openidcRed Hat / RHEL

Fixed in:0:2.4.9.4-5.module+el8.9.0+18723+672ccf5d.ppc64le::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:2.4.9.4-5.module+el8.9.0+18723+672ccf5d.aarch64::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:2.4.9.4-5.module+el8.9.0+18723+672ccf5d.src::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:2.4.9.4-5.module+el8.9.0+18723+672ccf5d.x86_64::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:2.4.9.4-5.module+el8.9.0+18723+672ccf5d.s390x::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:2.4.9.4-4.el9RHSA-2023:6365

mod_auth_openidcRocky

Fixed in:0:2.4.9.4-5.module+el8.9.0+18723+672ccf5d.aarch64::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:2.4.9.4-5.module+el8.9.0+18723+672ccf5d.src::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:2.4.9.4-5.module+el8.9.0+18723+672ccf5d.s390x::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:2.4.9.4-5.module+el8.9.0+18723+672ccf5d.x86_64::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:2.4.9.4-5.module+el8.9.0+18723+672ccf5d.ppc64le::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:2.4.9.4-4.el9RHSA-2023:6365

mod_auth_openidc-debuginfoRed Hat / RHEL

Fixed in:0:2.4.9.4-5.module+el8.9.0+18723+672ccf5d.s390x::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:2.4.9.4-5.module+el8.9.0+18723+672ccf5d.ppc64le::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:2.4.9.4-5.module+el8.9.0+18723+672ccf5d.x86_64::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:2.4.9.4-5.module+el8.9.0+18723+672ccf5d.aarch64::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:2.4.9.4-4.el9RHSA-2023:6365

mod_auth_openidc-debuginfoRocky

Fixed in:0:2.4.9.4-5.module+el8.9.0+18723+672ccf5d.s390x::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:2.4.9.4-5.module+el8.9.0+18723+672ccf5d.x86_64::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:2.4.9.4-5.module+el8.9.0+18723+672ccf5d.ppc64le::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:2.4.9.4-5.module+el8.9.0+18723+672ccf5d.aarch64::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:2.4.9.4-4.el9RHSA-2023:6365

mod_auth_openidc-debugsourceRed Hat / RHEL

Fixed in:0:2.4.9.4-5.module+el8.9.0+18723+672ccf5d.aarch64::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:2.4.9.4-5.module+el8.9.0+18723+672ccf5d.s390x::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:2.4.9.4-5.module+el8.9.0+18723+672ccf5d.ppc64le::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:2.4.9.4-5.module+el8.9.0+18723+672ccf5d.x86_64::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:2.4.9.4-4.el9RHSA-2023:6365

mod_auth_openidc-debugsourceRocky

Fixed in:0:2.4.9.4-5.module+el8.9.0+18723+672ccf5d.aarch64::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:2.4.9.4-5.module+el8.9.0+18723+672ccf5d.s390x::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:2.4.9.4-5.module+el8.9.0+18723+672ccf5d.ppc64le::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:2.4.9.4-5.module+el8.9.0+18723+672ccf5d.x86_64::mod_auth_openidc:2.3RHSA-2023:6940

Fixed in:0:2.4.9.4-4.el9RHSA-2023:6365

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeChanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N

Exploit Intelligence

0.91%probability of exploitation in 30 days

55thpercentile

Moderate risk: more likely to be exploited than 55% of all known CVEs.

References

Vendor Advisory1

github.com

Mailing List1

lists.debian.org

Product1

github.com

Related Vulnerabilities

Other CWE-601 (Open Redirect) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-4123	High	7.6	98%	-	Fix
CVE-2018-11784	Medium	4.3	94%	-	Fix
CVE-2021-22881	Medium	6.1	87%	-	Fix
CVE-2022-45402	Medium	6.1	82%	-	Fix
CVE-2017-1000117	High	8.8	78%	-	Fix
CVE-2019-10098	Medium	6.1	74%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.